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Solvatochromic parameters for binary mixtures of 1-(1-butyl)-3- methylimidazolium tetrafluoroborate with some protic molecular solvents

Harifi Mood, A. R ; Sharif University of Technology | 2006

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  1. Type of Document: Article
  2. DOI: 10.1021/jp0602373
  3. Publisher: American Chemical Society , 2006
  4. Abstract:
  5. The solvatochromic parameters (ETN, normalized polarity parameter; π*, dipolarity/polarizability; β, hydrogen-bond acceptor basicity; α, hydrogen-bond donor acidity) were determined for binary solvent mixtures of 1-(1-butyl)-3-methylimidazolium tetrafluoroborate ([bmim]BF4) with water, methanol, and ethanol at 25°C over the whole range of mole fractions. In nonaqueous solutions, the ETN value of the mixture increases with mole the fraction of [bmim]BF4 and then decreases gradually to the value of pure [bmim]BF4. Positive deviation from ideal behavior was observed for the solvent parameters ETN, π*, and α, whereas the deviation of the β parameter is negative. The applicability of the combined nearly ideal binary solvent/Redlich-Kister equation for the correlation of various solvatochromic parameters with solvent composition was proved too for the first time. This equation provides a simple computational model to correlate and/or predict various solvatochromic parameters for many binary solvent systems. The correlation between the calculated and the experimental values of various parameters was in accordance with this model. Solute-solvent and solvent-solvent interactions have been applied for interpretation of the results. © 2006 American Chemical Society
  6. Keywords:
  7. Correlation methods ; Ethanol ; Hydrogen bonds ; Mathematical models ; Methanol ; Organic solvents ; 1-(1-butyl)-3- methylimidazolium tetrafluoroborate ; Binary solvent ; Solvatochromic parameters ; Aromatic compounds
  8. Source: Journal of Physical Chemistry B ; Volume 110, Issue 13 , 2006 , Pages 7073-7078 ; 15206106 (ISSN)
  9. URL: https://pubs.acs.org/doi/10.1021/jp0602373